Questions raised as missing submersible debris found near Titanic wreckage.

The US Navy detected an "anomaly" that was likely the implosion of the Titan submersible, which was reported missing on Sunday. The Coast Guard announced on Thursday that all five people aboard the submersible were killed in the implosion. The debris field was discovered near the Titanic shipwreck, and the search for the submersible and the remains of the crew members remains ongoing. The delay in reporting the missing submersible and the need for more deep-sea technology have been highlighted by the search efforts.